Use of I-PASS increased dramatically within the past several months when they became available through a local grocery store chain. It’s a debit system, since tolls on ramps and at plazas are not all the same. Usage rate of I-PASS is now getting close to the 50% mark. I believe that one of the reasons for the differential rate proposal is to encourage I-PASS use at least among locals, which would speed up traffic and reduce labor costs (less manned toll booths).